Interested readers can now download the full text of my just-released Ph.D. dissertation, titled Monitoring particulate matter with commodity hardware [15 MB PDF]. Chapters 2 and 3 have previously been published as journal articles. New results obtained with the Shinyei PPD42NS sensor are presented in Chapter 4, “Observing urban plumes”.
Our paper on the development and evaluation of a PPD42NS-based instrument is now publicly available via the AMT Discussion forum (Article [PDF]; Supplement [PDF]). It’s permanently citable in its existing form, though it will technically be in review until March 24. Hope you find the results to be of interest, dear reader.
Long hiatus on the blog, but it’s been a busy couple of months. I’ve been doing some rapid prototyping with the Shinyei PPD42NS, pictured above in an OtterBox enclosure with a battery, real-time clock, microSD datalogger, and temperature-humidity sensor. I’m thinking of calling it the Bento, what with all the tasty little sensors inside (and h/t to Lady Ada’s Bento). As you can see, I’m no mechanical engineer. But some folks over in Mech Eng at Berkeley are starting to work with us on enclosures. Nice!
The Roving Networks WiFly RN-XV is a nice little device. For $35 at SparkFun you get a low-power 802.11b module with a real-time clock, analog and GPIO pins, basic DNS and HTTP literacy. It’s a perfectly capable wireless sensor node, just by itself. It even has a nifty UART trigger mode, where incoming serial input will send a basic GET request to your favorite URL with the payload tacked on.